{"id":9386,"date":"2023-03-16T12:32:34","date_gmt":"2023-03-16T20:32:34","guid":{"rendered":"https:\/\/www.shop2world.com\/blog\/?p=9386"},"modified":"2023-03-16T12:32:36","modified_gmt":"2023-03-16T20:32:36","slug":"php-%eb%b8%94%eb%a1%9d%ec%b2%b4%ec%9d%b8-%eb%b8%94%eb%a1%9d%ec%b2%b4%ec%9d%b8%ec%9d%98-%ed%95%b5%ec%8b%ac-%eb%ac%b4%ea%b2%b0%ec%84%b1-%ea%b2%80%ec%a6%9d%ec%9d%98-%ec%98%88","status":"publish","type":"post","link":"https:\/\/www.shop2world.com\/blog\/archives\/9386","title":{"rendered":"[PHP \ube14\ub85d\uccb4\uc778] \ube14\ub85d\uccb4\uc778\uc758 \ud575\uc2ec \ubb34\uacb0\uc131 \uac80\uc99d\uc758 \uc608"},"content":{"rendered":"\n

\ubb34\uacb0\uc131(Integrity)\uc740 \ub370\uc774\ud130\ub098 \uc815\ubcf4\uc758 \uc815\ud655\uc131, \uc644\uc804\uc131, \uc77c\uad00\uc131\uc774 \uc720\uc9c0\ub418\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \ub370\uc774\ud130\uac00 \ubcc0\uc870\ub418\uac70\ub098 \uc190\uc0c1\ub418\ub294 \ub4f1\uc758 \ubcc0\uacbd\uc774 \uc5c6\uc774 \uadf8\ub300\ub85c \uc720\uc9c0\ub418\ub294 \uac83\uc744 \ub9d0\ud569\ub2c8\ub2e4. \ube14\ub85d\uccb4\uc778\uc5d0\uc11c \ubb34\uacb0\uc131\uc740 \ube14\ub85d\uccb4\uc778\uc5d0 \uc800\uc7a5\ub41c \ub370\uc774\ud130\ub098 \ud2b8\ub79c\uc7ad\uc158\uc774 \ubcc0\uacbd\ub418\uac70\ub098 \uc190\uc0c1\ub418\uc9c0 \uc54a\uc558\uc74c\uc744 \uac80\uc99d\ud558\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ube14\ub85d\uccb4\uc778\uc758 \uc2e0\ub8b0\uc131\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.
\uc774 \ucf54\ub4dc\ub294 PHP\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube14\ub85d\uccb4\uc778\uc758 \uae30\ubcf8 \uc6d0\ub9ac\ub97c \uad6c\ud604\ud55c \uac04\ub2e8\ud55c \ud504\ub85c\uadf8\ub7a8\uc785\ub2c8\ub2e4. \uc774 \ud504\ub85c\uadf8\ub7a8\uc740 \ube14\ub85d\uccb4\uc778\uc758 \uae30\ubcf8 \uc6d0\ub9ac\ub97c \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

<\/p>\n\n\n

index = $index;\n        $this->timestamp = $timestamp;\n        $this->data = $data;\n        $this->previous_hash = $previous_hash;\n        $this->hash = $this->calculate_hash();\n    }\n\n    public function calculate_hash() {\n        return hash(\"sha256\", $this->index . $this->timestamp . $this->data . $this->previous_hash);\n    }\n}\n\nclass Blockchain {\n    private $chain;\n\n    public function __construct() {\n        $this->chain = array(new Block(0, time(), \"Genesis Block\", \"0\"));\n    }\n\n    public function add_block($data) {\n        $index = count($this->chain);\n        $previous_hash = $this->chain[$index - 1]->hash;\n        $timestamp = time();\n        $block = new Block($index, $timestamp, $data, $previous_hash);\n        $this->chain[] = $block;\n    }\n\n    public function is_valid() {\n        for ($i = 1; $i < count($this->chain); $i++) {\n            $current_block = $this->chain[$i];\n            $previous_block = $this->chain[$i - 1];\n\n            if ($current_block->hash !== $current_block->calculate_hash()) {\n                return false;\n            }\n\n            if ($current_block->previous_hash !== $previous_block->hash) {\n                return false;\n            }\n        }\n        return true;\n    }\n}\n\n\/\/ Sample Usage\n$blockchain = new Blockchain();\n$blockchain->add_block(\"Block 1 Data\");\n$blockchain->add_block(\"Block 2 Data\");\n\necho \"Is Blockchain Valid? \" . ($blockchain->is_valid() ? \"Yes\" : \"No\") . \"\\n\";\n\n\/\/ Tamper with Block 2 Data\n$blockchain->chain[2]->data = \"Tampered Data\";\necho \"Is Blockchain Valid? \" . ($blockchain->is_valid() ? \"Yes\" : \"No\") . \"\\n\";\n<\/pre>\n
\uc704 \ud504\ub85c\uadf8\ub7a8\uc740 Block \ud074\ub798\uc2a4\uc640 Blockchain \ud074\ub798\uc2a4\ub97c \uc815\uc758\ud558\uace0, \uac01\uac01 \ube14\ub85d\uc758 \uad6c\uc870\uc640 \ube14\ub85d\uccb4\uc778\uc758 \uae30\ub2a5\uc744 \uad6c\ud604\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ube14\ub85d\uccb4\uc778\uc5d0 \uc0c8\ub85c\uc6b4 \ube14\ub85d\uc744 \ucd94\uac00\ud560 \ub54c\ub294 add_block \uba54\uc18c\ub4dc\ub97c \ud638\ucd9c\ud558\uace0, \ube14\ub85d\uccb4\uc778\uc758 \ubb34\uacb0\uc131\uc744 \uac80\uc99d\ud560 \ub54c\ub294 is_valid \uba54\uc18c\ub4dc\ub97c \ud638\ucd9c\ud569\ub2c8\ub2e4. \uc704 \ud504\ub85c\uadf8\ub7a8\uc744 \uc2e4\ud589\ud558\uba74 \ube14\ub85d\uccb4\uc778\uc774 \uc0dd\uc131\ub418\uace0, \uc0c8\ub85c\uc6b4 \ube14\ub85d\uc774 \ucd94\uac00\ub418\uba70, \ub9c8\uc9c0\ub9c9\uc73c\ub85c \ube14\ub85d\uccb4\uc778\uc758 \ubb34\uacb0\uc131\uc774 \uac80\uc99d\ub429\ub2c8\ub2e4. \ub9c8\uc9c0\ub9c9\uc73c\ub85c, Block 2\uc758 \ub370\uc774\ud130\ub97c \ubcc0\uacbd\ud574 \ube14\ub85d\uccb4\uc778\uc758 \ubb34\uacb0\uc131\uc744 \uc704\ubc18\ud558\ub294 \ucf54\ub4dc\uc785\ub2c8\ub2e4. \ube14\ub85d\uccb4\uc778\uc5d0\uc11c\ub294 \uac01 \ube14\ub85d\uc774 \uc774\uc804 \ube14\ub85d\uacfc \ub9c1\ud06c\ub418\uc5b4 \uc788\uc5b4 \ube14\ub85d\uccb4\uc778\uc744 \ud615\uc131\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc774\uc804 \ube14\ub85d\uc758 \ub370\uc774\ud130\uac00 \ubcc0\uacbd\ub418\uba74 \uc774\uc804 \ube14\ub85d\uc758 \ud574\uc2dc \uac12\ub3c4 \ubcc0\uacbd\ub429\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \uc774\uc804 \ube14\ub85d\uacfc\uc758 \uc5f0\uacb0\uc774 \uae68\uc838\ubc84\ub824 \ud574\ub2f9 \ube14\ub85d\ubd80\ud130 \uc774\ud6c4\uc758 \ubaa8\ub4e0 \ube14\ub85d\uc774 \ubb34\ud6a8\ud654\ub429\ub2c8\ub2e4.<\/p>\n
\/\/ Tamper with Block 2 Data\n$blockchain->chain[2]->data = \"Tampered Data\";\necho \"Is Blockchain Valid? \" . ($blockchain->is_valid() ? \"Yes\" : \"No\") . \"\\n\";<\/pre>\n
\u00a0<\/p>\n
\uc2e4\ud589 \ud558\uae30<\/a><\/p>\n
$blockchain->is_valid() \ud568\uc218\ub294 \ud604\uc7ac \ube14\ub85d\uccb4\uc778\uc774 \uc720\ud6a8\ud55c\uc9c0 \uc5ec\ubd80\ub97c \ud310\ub2e8\ud558\uae30 \uc704\ud574 \ubaa8\ub4e0 \ube14\ub85d\uc758 \ubb34\uacb0\uc131\uc744 \uac80\uc0ac\ud569\ub2c8\ub2e4. \uc774 \uac80\uc0ac\ub294 \uccb4\uc778\uc758 \ubaa8\ub4e0 \ube14\ub85d\uc774 \uc790\uc2e0\uc758 \ud574\uc2dc\uc640 \uc774\uc804 \ube14\ub85d\uc758 \ud574\uc2dc\uac00 \ub9de\ub294\uc9c0\ub97c \uac80\uc99d\ud558\uba70 \uc218\ud589\ub429\ub2c8\ub2e4.<\/p>\n
\uc704 \ucf54\ub4dc\uc5d0\uc11c Tamper with Block 2 Data \ubd80\ubd84\uc5d0\uc11c\ub294 \ube14\ub85d\uccb4\uc778\uc758 \ubb34\uacb0\uc131\uc744 \uce68\ud574\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc774\ub294 \uc774\ubbf8 \uc0dd\uc131\ub41c \ube14\ub85d\uc758 \ub370\uc774\ud130\ub97c \ubcc0\uacbd\ud558\uace0 \uc788\ub294 \uac83\uc77c \ubfd0, \ube14\ub85d\uccb4\uc778 \uc790\uccb4\uc758 \uad6c\uc870\ub97c \ubcc0\uacbd\ud558\uace0 \uc788\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4.<\/p>\n
\ub530\ub77c\uc11c, Tamper with Block 2 Data \ubd80\ubd84\uc740 \ube14\ub85d\uccb4\uc778\uc758 \uad6c\uc870\ub97c \ubcc0\uacbd\ud558\ub294 \uac83\uc740 \uc544\ub2c8\uae30 \ub54c\ubb38\uc5d0, \uc774\uc804 \ube14\ub85d\uacfc \ud604\uc7ac \ube14\ub85d\uc758 \ud574\uc2dc\uac12\uc774 \ubcc0\uacbd\ub418\uc9c0 \uc54a\uc558\uae30 \ub54c\ubb38\uc5d0 \ube14\ub85d\uccb4\uc778\uc740 \uc5ec\uc804\ud788 \uc720\ud6a8\ud569\ub2c8\ub2e4. \uc989, is_valid() \ud568\uc218\ub294 \uc5ec\uc804\ud788 true\ub97c \ubc18\ud658\ud558\uac8c \ub429\ub2c8\ub2e4.<\/p>","protected":false},"excerpt":{"rendered":"
\ubb34\uacb0\uc131(Integrity)\uc740 \ub370\uc774\ud130\ub098 \uc815\ubcf4\uc758 \uc815\ud655\uc131, \uc644\uc804\uc131, \uc77c\uad00\uc131\uc774 \uc720\uc9c0\ub418\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \ub370\uc774\ud130\uac00 \ubcc0\uc870\ub418\uac70\ub098 \uc190\uc0c1\ub418\ub294 \ub4f1\uc758 \ubcc0\uacbd\uc774 \uc5c6\uc774 \uadf8\ub300\ub85c \uc720\uc9c0\ub418\ub294 \uac83\uc744 \ub9d0\ud569\ub2c8\ub2e4. \ube14\ub85d\uccb4\uc778\uc5d0\uc11c \ubb34\uacb0\uc131\uc740 \ube14\ub85d\uccb4\uc778\uc5d0 \uc800\uc7a5\ub41c \ub370\uc774\ud130\ub098 \ud2b8\ub79c\uc7ad\uc158\uc774 \ubcc0\uacbd\ub418\uac70\ub098 \uc190\uc0c1\ub418\uc9c0 \uc54a\uc558\uc74c\uc744 \uac80\uc99d\ud558\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ube14\ub85d\uccb4\uc778\uc758 \uc2e0\ub8b0\uc131\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\uc774 \ucf54\ub4dc\ub294 PHP\ub97c \uc0ac\uc6a9\ud558\uc5ec \ube14\ub85d\uccb4\uc778\uc758 \uae30\ubcf8 \uc6d0\ub9ac\ub97c \uad6c\ud604\ud55c \uac04\ub2e8\ud55c \ud504\ub85c\uadf8\ub7a8\uc785\ub2c8\ub2e4. \uc774 \ud504\ub85c\uadf8\ub7a8\uc740 \ube14\ub85d\uccb4\uc778\uc758 \uae30\ubcf8 \uc6d0\ub9ac\ub97c \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. index = $index; $this->timestamp = $timestamp; $this->data = $data; $this->previous_hash = $previous_hash; $this->hash = $this->calculate_hash(); } public …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[716],"tags":[725],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/posts\/9386"}],"collection":[{"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/comments?post=9386"}],"version-history":[{"count":1,"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/posts\/9386\/revisions"}],"predecessor-version":[{"id":9387,"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/posts\/9386\/revisions\/9387"}],"wp:attachment":[{"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/media?parent=9386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/categories?post=9386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shop2world.com\/blog\/wp-json\/wp\/v2\/tags?post=9386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}